Set 2: Trigonometry

Explanation

Answer: D

If $x = 3$ , what is the value of $7x + 15$ ?

✓ Correct

Detailed Explanation

Choice D is correct. 1. Substitute $x = 3$ $7(3) + 15$ $= 21 + 15$ $= 36$ Therefore, $7x + 15 = 36$ when $x = 3$ .

Key Steps:

•

Apply the appropriate mathematical formula

•

The correct answer is 36

Why others are wrong:

A: This would give an incorrect result. Choice A is incorrect and may result from a calculation error.

B: This would give an incorrect result. Choice B is incorrect and may result from a calculation error.

C: This would give an incorrect result. Choice C is incorrect and may result from a calculation error.

Master all sections for your best SAT score